On the diversity dilemma, I agree. If you want to be a concept artist, you better know at least two fields inside out. For example, environments and structure/equipment etc. design. However, to get my foot to the actual door and get those first few jobs I've heard from various locations that a niche, focus, will be real helpful. So I am trying to establish myself as the "environment guy" when my tech hits the right point. That's why I have to distract myself from other works from time to time to scribble up some nice environment studies.
However, I can't ignore everything else because of that. I've got a bad habit of working a bit slower when the subject doesn't motivate me much, and that's something I should really get rid of. I'll finish this one, on the double!
This study group is damn great, and it's really helping me out since I kinda have to dwell in the areas I've not visited before. +everything that you mentioned Wheel. I definitely gotta say that I am not an ID guy (too much pedantic drawing), but Ebersol seems to have great going with it and I hope Re has too. I am definitely looking forward to the next job! Will be fun when we all are working on the same subject.
EDIT: Hey, page two already! Great going.